Marlboro

I have been smoking for seven years now and for the past couple of weeks every pack of marlboro lights that I purchase are bad. They burn out about halfway through each cigarette, it is very weird and this has never happened before. The only way I know how to describe it is that the cigarettes just don't burn right anymore and this is the only brand that I smoke. Cigarettes are way to expensive and i'm tired of spending almost six dollars a pack and not being able to enjoy them. I have been a loyal marlboro consumer for a long time now but if this continues I am going to have to switch to a different brand. Please check into this issue it would be greatly appreciated.